OK, it's better to find something that exports DXF in more pieces... But I have several software, none of it exports DXF in pieces:-(. The image shows an object created -not by me- in Designworkshop. I have exported it as a DXF, converted to OBJ and then opened as a box in UVmapper. Just to show you that it will be quite easy to create a texture for it.

Guitta